Grate-bar.



T. s. JOHNSON. GRATE BAR.

APPLICATION FILED APR. 7, 1913.

1,125,551, Patented Jan.19,1915.

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useful improvements in grate bars,

THOMAS S. JOHNSON, 0F SCRANTON, PENNSYLVANIA.

GRATE-BAR.

To all 'whom t may concern Be it known that I, THOMAS S. JOHNSON, a citizen of the United States, residing at Scranton, in thecounty of Lackawanna and VState of Pennsylvania, have invented new and useful Improvements in Grate-Bars, of which the following is a specification.

' This invention relates to certain new and and pertains more particularly to a grate bar which has means incorporated therein to convey air to the fuel throughout the entire area of the bar.

Further the invention aims to provide a grate bar structure in which means is provided for preventing the ashes from interfering withl proper alinement of the grate bars, where the latter overlap.

In the drawings: Figure l is a fragmentary end elevation partly in section, showing 'the overlapping portions of the grate bars; Fig. 2 is an enlarged top plan view of one of the grate bars; and Fig. 3 is a side elevation of Fig. 2. ,l

The upperface of each gra-te bar 1 isV formed with a series of intersecting grooves 3, which latter are preferably diagonally arranged, and cover the entire area of the grate bar with a series, or network, so to speak, of horizontal air passages, which underlying the fuel, will allow access of the air to the latter, throughout substantially the entire area of the grate bar. In order to supply air to the horizontal air passages 3, lthe grate bars are formed with a series of vertical openings 4 that provide vertical air passages to supply air to the horizontal Vair passages 3. The vertical air passages 4: are formed at the intersections of the horizontal air passages 3,` in order to enable each vert-ical air passage 4C to supply air to four of the horizontal air passages 3, which results not only in even distribution of the air tothe fuel, but also in quick distribution as well. The longitudinal sides of the grate bars are also formed with vertical grooves 5 that feed the air to the outer ends of the grooves 3 where the latter intersect..

One end of each grate bar has a ledge 6 that is engaged on its upper face by the adjacent end 7 of the ladjacent grate bar, the ledge 6 being located in a plane below the plane` ofthe end 7 and being formed with a series of vertical openings 8, which latter register with the. lower ends of pas- Specifcation of Letters Patent.

Application filed 'April 7, 1913.

Patented Jan. 19, 1915. Serial No. 759,560.

sages 9 that are formed between the adjacent ends of adjacent grate bars, in order to allow ashes to gravitate down through the passages 9, and then through the pas sages 6 so as not to interfere with proper alinement between the grate bars where same contact at their ends, suoli as frequentlyV ted to accumulate on the ledges 6. -In addition the passages 8 and 9 further act to Vsupply air to the fuel.

The passages 3 and Ll, may be formed of any depth or width to meet different conditions of use or character of the fuel.

Vhat is claimed is:

l. A pair of grateV bars having their adjacent ends similarly inclined and arranged in substantial parallelism to conjointly forma passage diagonally related to the top and bottom faces of the grate bars, and a horizontally disposed ledge on th'e end of one of said grate bars which ledge has its upper face extending across said diagonal passage and engaged with the under face of the end of the other grate bar, said ledge being formed with a plurality of vertical openings which register with said diagonal passage so as to allow air to be fed through said openings and through the diagonal passage to have access to the upper faces of the grate bars, and to alsoallow ashes which contact with the ledge to gravitate down through said openings.

2. A pair of grate bars having their adjacent ends spaced to form a passage therebetween, a horizontal ledge on the end of one of said grate bars which .ledge has its upper face extending across said passage and engaged with the under face of the other grate bar, said ledge being formed with vertical openings which register with said passage and said bars having horizontal grooves on their upper faces which com` municate directly with said passage whereby air which enters the openings will enter the passage and be distributed to said horizontal grooves.

occurs where the ashes are permit- In testimony whereof I have hereunto Y set my hand in presence of two subscribing JOSEPH RowAN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

